rfid | Arduino RFID Library for MFRC522

by miguelbalboa C++ Version: 1.4.10 License: Unlicense

X-Ray Key Features Code Snippets Community Discussions(10)Vulnerabilities Install Support

kandi X-RAY | rfid Summary

rfid is a C++ library typically used in Internet of Things (IoT), Arduino applications. rfid has no bugs, it has no vulnerabilities, it has a Permissive License and it has medium support. You can download it from GitHub.

Arduino RFID Library for MFRC522

Support

Quality

Security

License

Reuse

Support

rfid has a medium active ecosystem.

It has 2494 star(s) with 1366 fork(s). There are 175 watchers for this library.

It had no major release in the last 12 months.

There are 16 open issues and 368 have been closed. On average issues are closed in 246 days. There are 2 open pull requests and 0 closed requests.

It has a neutral sentiment in the developer community.

The latest version of rfid is 1.4.10

Quality

rfid has no bugs reported.

Security

rfid has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

License

rfid is licensed under the Unlicense License. This license is Permissive.

Permissive licenses have the least restrictions, and you can use them in most projects.

Reuse

rfid releases are available to install and integrate.

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rfid Key Features

No Key Features are available at this moment for rfid.

rfid Examples and Code Snippets

No Code Snippets are available at this moment for rfid.

Community Discussions

Trending Discussions on rfid

How to combine/merge cells of a column into a list with a common user id in PostgreSQL?

Arduino Uno, PLX-DAQ and 125Khz RFID reader problem

How to remove complete row in DataTable if have class active jQuery

How to use both MFRC522 and RDM6300 using a NODEMCU

Why does my app stop responding when navigating to MainPage twice when connecting to serial port?

Window switching and threading in PyQt5

Writing script to perform a series of commands over serial connection with PuTTY

Replacing true or false in table value with an image in Razor Pages

uwebsockets failed to start: libuv.c:-1: error: undefined reference to `uv_is_closing'

QUESTION

How to combine/merge cells of a column into a list with a common user id in PostgreSQL?

Asked 2021-Jun-15 at 02:20

Example of what I'm trying to achieve

I want to merge/combine all group names that a user is a member of into a list of group names for each user record.

For example, lets say I have the following users in my database:

...

ANSWER

Answered 2021-Mar-30 at 17:45

you don't need to group by ag.name since it would be the aggregation for the group :

Source https://stackoverflow.com/questions/66875864

QUESTION

Arduino Uno, PLX-DAQ and 125Khz RFID reader problem

Asked 2021-Jun-13 at 12:23

Project largely working. Have a 125Khz RFID module on an Arduino Uno, with SD card module and and RTC, all working nicely and passing data via PLX-DAQ to Excel and storing data to SD card.

I need a way of working out when the Uno is connected via PLX-DAQ to USB/serial, or when the Uno is just on battery.

So I thought to set a particular cell on Excel with the PLX-DAQ form macro in VBA to 1 (when connected) or 0 (disconnected) then read that in the Arduino code to determine whether to pass data via serial to excel or pull stored data off SD card.

The cell J4 toggles 0 or 1 according to whether disconnected / connected.

I then use the GET function of PLX-DAQ to read a cell from the Arduino sketch.

To upload the sketch I have to disconnect the connection between the RFID Tx and Arduino Rx or I get an error, which is normal, and if I run the sketch with that wire disconnected GET works fine.

...

ANSWER

Answered 2021-Jun-12 at 01:54

I assume you leave the arduino TX wire connected to the PC-RX. Thats why your PLX-DAQ still has the input. And as you suspect nothing will be going back.

First I thought, since nothing will come back, so your code will be stuck on

Source https://stackoverflow.com/questions/67829434

QUESTION

JavaScript read more, read less button with dynamic data from MySQL database and PHP

Asked 2021-Jun-13 at 12:22

I have fetched an associative array from database and the problem is that the purpose i.e. $row['purpose'] remains all the same and is set to the very last row fetched Below is my entire PHP Script

Note:- This question is answered and the question code is replaced with a working answer The question has been answered and the code I provided with the question has been replaced with the code from the answer

...

ANSWER

Answered 2021-Jun-13 at 12:22

in you foreach you should pass the actula values of $row['purpose']

Source https://stackoverflow.com/questions/66198364

QUESTION

How to remove complete row in DataTable if have class active jQuery

Asked 2021-Jun-08 at 12:01

I work with datatable and i need to hide all rows in which i have class .fa-active

...

ANSWER

Answered 2021-Jun-08 at 12:01

You can use $.fn.dataTable.ext.search.. and then inside this add your custom filter i.e : row which you need to hide . So , as you need to hide tr if it has .fa-active element you can use $(table.row(dataIndex).node()).find('.fa-active').length == 0 this will return all trs which doesn't have that element and show them.

Demo Code :

Source https://stackoverflow.com/questions/67886242

QUESTION

How to use both MFRC522 and RDM6300 using a NODEMCU

Asked 2021-May-29 at 00:13

I want to use both MFRC522 and RDM6300 readers on a single NodeMCU, the two separate codes for each readers are respectively :

...

ANSWER

Answered 2021-May-29 at 00:13

void loop() {
if (  mfrc522.PICC_IsNewCardPresent()) {


// Select one of the cards
     if (  mfrc522.PICC_ReadCardSerial()) {



  // Dump debug info about the card; PICC_HaltA() is automatically called
         mfrc522.PICC_DumpToSerial(&(mfrc522.uid));
    }
 }
  if (rdm6300.update())
    Serial1.println(rdm6300.get_tag_id(), DEC);

}

Source https://stackoverflow.com/questions/67745313

QUESTION

Why does my app stop responding when navigating to MainPage twice when connecting to serial port?

Asked 2021-May-28 at 08:59

I am developing a simple UWP app which needs to listen to a serial port connected to an esp32 which has a rfid reader attached.

It needs to receive UID of card, navigate to new page, and then navigate back to the original page after a timer has elapsed, or a button has been clicked.

It is all working, except for the part where I navigate back to the original parent page. I believe it's because the app is trying to reconnect to the serial port, but it's unavailalbe. I've tested my theory by creating a setup button with the serial connection setup on this and it does work as expected.

So, does Page_Loaded fire every time the page is reloaded? Is there a function which only fires on the first loading of the form? I can't get disposing of the serial port to work at all, i just get an unhandled exception. I don't have a problem leaving the serial port open though, but this seems to be causing problems too!

Please see some sample code below:

...

ANSWER

Answered 2021-May-28 at 08:52

So, does Page_Loaded fire every time the page is reloaded?

Yes.

Is there a function which only fires on the first loading of the form?

You could use a boolean flag to determine whether to execute your method:

Source https://stackoverflow.com/questions/67734374

QUESTION

Window switching and threading in PyQt5

Asked 2021-May-11 at 13:27

I am working on GUI with PyQT. My goal is to make a program that reads the id from RFID card and switches windows after reading.

My current problem is that when I run the program the first window (lock screen) won't show at all, but after reading the card the second window(menu) shows up. I can't find my way this problem. My first try was without threading at all but I thought threading would help on this problem, but I ended up in same situation. Reading the card works and so on, but I assume problem is on Qt as I dont have lot of experience with Qt.

...

ANSWER

Answered 2021-May-11 at 13:27

You are using threads incorrectly. If you inherit QThread, you should only call start() from main thread and in QThread's run() method place all operations, if you call thread methods from main thread they got executed in main thread (myThread.read() runs in main thread and blocks event loop until return from read()).

Source https://stackoverflow.com/questions/67487155

QUESTION

Writing script to perform a series of commands over serial connection with PuTTY

Asked 2021-Apr-28 at 05:32

I have an RFID reader that I need to download data from periodically via a serial port connection (serial to USB). I have been using PuTTY to connect to the reader. I saved a session in PuTTY with all of the correct parameters for the reader and named it "test". I also used "All session output" under Logging so that the output will be stored in a file. I access the session via the Windows 10 command line like this:

...

ANSWER

Answered 2021-Apr-22 at 12:50

PuTTY is not the right tool for automation, use Plink:
Automating command/script execution using PuTTY

You just need to know specifying the commands on Plink command-like or with the -m switch commonly used with Plink (the -m even with PuTTY) works with the SSH protocol only.

With other protocols, notably with the serial connections, you can use the input redirection only (also covered in my answer to the question linked above), like this:

Source https://stackoverflow.com/questions/67204011

QUESTION

Replacing true or false in table value with an image in Razor Pages

Asked 2021-Apr-28 at 01:40

Hi I am coding in Razor pages. I have a table where one of my values is boolean value where it shows either true or false in the table at the moment. I would like to switch these values with images in my wwwroot folder. The variable with a boolean value is the @tool.Borrowed.

My HTML Code

...

ANSWER

Answered 2021-Apr-28 at 01:40

If you want to add images depending on the value of @tool.Borrowed.You can use conditional operator.Here is a demo:

wwwroot structure:

cshtml:

Source https://stackoverflow.com/questions/67291425

QUESTION

uwebsockets failed to start: libuv.c:-1: error: undefined reference to `uv_is_closing'

Asked 2021-Apr-27 at 05:15

My project has linked uwebsockets. linked libs:

...

ANSWER

Answered 2021-Apr-27 at 05:15

Is there any linking sequence problem? I see that usockets links behind libuv, maybe we can try swap the sequence: to link usockets first.

You are using static linkage, and usockets depends on libuv, so swap the sequence will fix the problem.

Vulnerabilities

No vulnerabilities reported

Install rfid

You can download it from GitHub.

Support

For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .

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